Three vetted installers cover Delaware County, led by a solar firm headquartered inside the county since 2009. The county-specific truth: 49 separate municipalities issue the permits here, PECO sets the utility rules for all of them, and with no Pennsylvania tax credit the quote price does nearly all the work. Hire the company that knows your town hall, and hold every bid against the $2.84 per watt benchmark.
Delaware County packs 49 municipalities into 184 square miles, and every one of them runs its own permit desk. That is the quiet variable in a solar quote here: the utility rules are uniform because PECO serves the county, but the inspection schedule in Upper Darby is not the one in Media or Ridley. Pennsylvania keeps the money side simple, full retail net metering and no state tax credit, so the winning installer is the one with clean paperwork, a fair price and recent permits in your specific town. These 3 cleared our checks.
One Utility, 49 Permit Desks: What Shapes a Delaware County Quote
- PECO handles the meter, your municipality handles the roof. Interconnection, net metering credits and the year-end surplus settlement all run through PECO. The building permit, the inspection and the approval timeline belong to whichever of the county’s 49 municipalities you live in. Ask any bidder when they last pulled a permit in your town, not in the county.
- Exports are worth the full retail rate. Pennsylvania credits the power you send back at the same rate you pay to buy it, which keeps owned systems attractive and makes the arithmetic easy to check. The one detail worth confirming in writing is how PECO settles leftover credits at the end of the year.
- The price is the whole game now. Pennsylvania offers no state income tax break, and the federal residential credit ended for installations completed after December 31, 2025. Pennsylvania’s competitive installed price is $2.84 per watt, so a 7 kW system should land near $19,900 before extras. Every dollar above that anchor needs a named reason on the quote.
The 3 Installers We Back in Delaware County
TerraSol Energies
The county’s own: headquartered on Watkin Avenue in Chadds Ford, at Delaware County’s southwestern edge, founded in 2009 by a team of Villanova engineers. Its own site highlights PECO Certified Trade Ally status, useful given who runs every meter here, and work across Pennsylvania, Delaware, New Jersey and Maryland. Its HICPA registration number is not printed on its site; ask for it with the quote and check it against the state register, the same standard we hold everyone to.
Green Power Energy
A regional installer whose Pennsylvania licence appears right on its website next to its New Jersey and Connecticut credentials, which is the disclosure habit we want everyone to copy. It leans toward cash and loan deals over leases, and in a state that pays full retail for your exports, that keeps the savings on your side of the meter. Its base is Annandale, New Jersey, so ask which crew and which office handle Delaware County work.
Trinity Solar
The Northeast’s volume leader, family-owned since 1994, with Pennsylvania among its nine states. That scale buys crew depth and plenty of permitting reps, including in the Philadelphia suburbs. Its base is Wall Township, New Jersey, so the question to settle before signing is which facility services your system and how fast someone reaches Delaware County in year 6.
What Separates the Three, in One Table
Installer | Where the crews sit | Proof point | Pin down before signing |
|---|---|---|---|
TerraSol Energies | Chadds Ford, in the county | PECO Certified Trade Ally | HICPA number with the quote |
Green Power Energy | Annandale, NJ | PA licence on its own site | Which office serves the county |
Trinity Solar | Wall Township, NJ | Northeast volume leader | Year-6 service commitment |
The benchmark price, your PECO rate and your town’s permit routine are all checkable before anyone visits your roof. Enter your ZIP code and we will pull the picture together for your address.
Put verified Delaware County numbers behind your decision
Where Delaware County Solar Deals Go Wrong
Four Answers to Get in Writing First
What is your HICPA registration number?
How does PECO settle my leftover credits at year end?
Why is my price above $2.84 per watt?
Who files my permit, and when did you last file one in my town?
How We Rank Solar Companies
Rankings are built from what we can verify, never from who pays us. For Delaware County, five weighted factors:
Frequently Asked Questions
TerraSol Energies, Green Power Energy and Trinity Solar make up our vetted Delaware County network for 2026. TerraSol ranks first as the local pick, headquartered in Chadds Ford inside the county and installing since 2009.
Pennsylvania’s competitive installed price is $2.84 per watt before incentives, per the EcoGen Solar Cost Index, which puts a 7 kW system near $19,900. Roof condition and equipment choices move the total, and each adder should appear as a named line item.
It can be, because Pennsylvania credits exported power at the full retail rate and adds modest SREC income on top. With the federal residential credit ended after 2025, the case rests on an honest price near $2.84 per watt and right-sized equipment rather than on subsidies.
Yes. PECO credits the electricity you export at the full retail rate under Pennsylvania’s net metering rules. Confirm in writing how year-end surplus credits are settled, which is the one PECO-specific detail proposals tend to skip.
Yes, from your own municipality rather than from the county, and Delaware County has 49 of them, each with its own process and timeline. Your installer should file it, name the town on the proposal and quote a timeline from recent permits filed there.
Shopping beyond the county line? The Pennsylvania company rankings cover the statewide field, and the Pennsylvania cost guide shows the arithmetic behind the $2.84 benchmark.
Skip the door-knock roulette. Enter your ZIP code and compare installers whose paperwork we already checked.
Compare installers whose paperwork we checked
Sources
References & Research Sources
EcoGen America reviewed Pennsylvania Public Utility Commission net metering rules, PECO interconnection resources, the Pennsylvania Attorney General’s home improvement contractor register, Delaware County municipal information, installer base, credential and warranty disclosures published by the companies themselves, and federal tax guidance for this article. Sources were accessed August 13, 2026, unless another date is listed below.
- Pennsylvania Public Utility Commission. Net Metering and Interconnection Rules. State rules crediting exports at the retail rate. Accessed August 13, 2026.
- PECO. Interconnection and Net Metering Resources. Utility resource for Delaware County meters. Accessed August 13, 2026.
- Pennsylvania Office of Attorney General. Home Improvement Contractor Registration (HICPA) Register. The state’s contractor registration database. Accessed August 13, 2026.
- Delaware County, Pennsylvania. Municipalities. County listing of its 49 municipalities. Accessed August 13, 2026.
- TerraSol Energies. Company Base, History and Credential Resources. Installer-published information. Accessed August 13, 2026.
- Green Power Energy. Company Licence and Warranty Resources. Installer-published information. Accessed August 13, 2026.
- Trinity Solar. Company Coverage and History Resources. Installer-published information. Accessed August 13, 2026.
- Internal Revenue Service (IRS). FAQs for Modification of Sections 25C, 25D, 25E, 30C, 30D, 45L, 45W and 179D under Public Law 119-21. Federal guidance confirming termination of the residential clean energy credit for installations completed after December 31, 2025. Accessed August 13, 2026.
